Synthesis, Antibacterial Activity, and Docking Studies of 1,2,3‐triazole‐tagged Thieno[2,3‐ d ]pyrimidinone Derivatives

Novel (1‐(substituted phenyl)‐1 H ‐1,2,3‐triazol‐4‐yl)methyl‐2‐(4‐oxo‐5,6,7,8‐tetrahydrobenzo[1,2]thieno[2,3‐ d ]pyrimidin‐3(4 H )‐yl)acetate derivatives were synthesized. All the compounds showed significant antibacterial activity against Gram‐negative ( Escherichia coli and Klebsiella pneumonia ) and Gram‐positive ( Bacillus subtilis and Bacillus cereus ) bacteria. Particularly, (1‐(3‐nitrophenyl)‐1 H ‐1,2,3‐triazol‐4‐yl)methyl‐2‐(4‐oxo‐5,6,7,8‐tetrahydrobenzo[1, 2]thieno[2,3‐ d ]pyrimidin‐3(4 H )‐yl)acetate was found to be most potent against E. coli , K. pneumonia , and B. subtilis with MIC 25 μg/ml . Molecular docking was also performed on purine riboswitch of B. subtilis and thiamine pyrophosphate riboswitch of E. coli .